egroupware_official/etemplate/js/et2_grid.js
2011-08-15 08:42:07 +00:00

537 lines
12 KiB
JavaScript

/**
* eGroupWare eTemplate2 - JS Description object
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage api
* @link http://www.egroupware.org
* @author Andreas Stöckel
* @copyright Stylite 2011
* @version $Id$
*/
"use strict";
/*egw:uses
jquery.jquery;
et2_DOMWidget;
et2_xml;
*/
/**
* Class which implements the "grid" XET-Tag
*/
var et2_grid = et2_DOMWidget.extend({
init: function(_parent) {
// Create the table body and the table
this.tbody = $j(document.createElement("tbody"));
this.table = $j(document.createElement("table"))
.addClass("et2_grid");
this.table.append(this.tbody);
// Call the parent constructor
this._super.apply(this, arguments);
// Counters for rows and columns
this.rowCount = 0;
this.columnCount = 0;
// 2D-Array which holds references to the DOM td tags
this.cells = [];
this.managementArray = [];
},
destroy: function() {
// Delete all references to cells or widgets
this.cells = null;
this.managementArray = null;
},
_initCells: function(_colData, _rowData) {
// Copy the width and height
var w = _colData.length;
var h = _rowData.length;
// Create the 2D-Cells array
var cells = new Array(h);
for (var y = 0; y < h; y++)
{
cells[y] = new Array(w);
// Initialize the cell description objects
for (var x = 0; x < w; x++)
{
cells[y][x] = {
"td": null,
"widget": null,
"colData": _colData[x],
"rowData": _rowData[y],
"colSpan": 1,
"autoColSpan": false,
"rowSpan": 1,
"autoRowSpan": false,
"x": x,
"y": y
};
}
}
return cells;
},
_getColDataEntry: function() {
return {
"width": "auto",
"class": "",
"align": "",
"span": "1"
};
},
_getRowDataEntry: function() {
return {
"height": "auto",
"class": "",
"valign": "",
"span": "1"
};
},
_getCell: function(_cells, _x, _y) {
if ((0 <= _y) && (_y < _cells.length))
{
var row = _cells[_y];
if ((0 <= _x) && (_x < row.length))
{
return row[_x];
}
}
throw("Error while accessing grid cells, invalid element count or span value!");
},
_forceNumber: function(_val) {
if (isNaN(_val))
{
throw(_val + " is not a number!");
}
return parseInt(_val);
},
_fetchRowColData: function(columns, rows, colData, rowData) {
// Parse the columns tag
et2_filteredNodeIterator(columns, function(node, nodeName) {
var colDataEntry = this._getColDataEntry();
if (nodeName == "column")
{
colDataEntry["width"] = et2_readAttrWithDefault(node, "width", "auto");
colDataEntry["class"] = et2_readAttrWithDefault(node, "class", "");
colDataEntry["align"] = et2_readAttrWithDefault(node, "align", "");
colDataEntry["span"] = et2_readAttrWithDefault(node, "span", "1");
}
else
{
colDataEntry["span"] = "all";
}
colData.push(colDataEntry);
}, this);
// Parse the rows tag
et2_filteredNodeIterator(rows, function(node, nodeName) {
var rowDataEntry = this._getRowDataEntry();
if (nodeName == "row")
{
rowDataEntry["height"] = et2_readAttrWithDefault(node, "height", "auto");
rowDataEntry["class"] = et2_readAttrWithDefault(node, "class", "");
rowDataEntry["valign"] = et2_readAttrWithDefault(node, "valign", "");
rowDataEntry["span"] = et2_readAttrWithDefault(node, "span", "1");
}
else
{
rowDataEntry["span"] = "all";
}
rowData.push(rowDataEntry);
}, this);
},
_fillCells: function(cells, columns, rows) {
var h = cells.length;
var w = (h > 0) ? cells[0].length : 0;
// Read the elements inside the columns
var x = 0;
et2_filteredNodeIterator(columns, function(node, nodeName) {
function _readColNode(node, nodeName) {
if (y >= h)
{
et2_debug("warn", "Skipped grid cell in column, '" +
nodeName + "'");
return;
}
var cell = this._getCell(cells, x, y);
// Read the span value of the element
if (node.getAttribute("span"))
{
cell.rowSpan = node.getAttribute("span");
}
else
{
cell.rowSpan = cell.colData["span"];
cell.autoRowSpan = true;
}
if (cell.rowSpan == "all")
{
cell.rowSpan = cells.length;
}
var span = cell.rowSpan = this._forceNumber(cell.rowSpan);
// Create the widget
var widget = this.createElementFromNode(node, nodeName);
// Fill all cells the widget is spanning
for (var i = 0; i < span && y < cells.length; i++, y++)
{
this._getCell(cells, x, y).widget = widget;
}
};
// If the node is a column, create the widgets which belong into
// the column
var y = 0;
if (nodeName == "column")
{
et2_filteredNodeIterator(node, _readColNode, this);
}
else
{
_readColNode.call(this, node, nodeName);
}
x++;
}, this);
// Read the elements inside the rows
var y = 0;
et2_filteredNodeIterator(rows, function(node, nodeName) {
function _readRowNode(node, nodeName) {
if (x >= w)
{
et2_debug("warn", "Skipped grid cell in row, '" +
nodeName + "'");
return;
}
var cell = this._getCell(cells, x, y);
// Read the span value of the element
if (node.getAttribute("span"))
{
cell.colSpan = node.getAttribute("span");
}
else
{
cell.colSpan = cell.rowData["span"];
cell.autoColSpan = true;
}
if (cell.colSpan == "all")
{
cell.colSpan = cells[y].length;
}
var span = cell.colSpan = this._forceNumber(cell.colSpan);
// Create the element
var widget = this.createElementFromNode(node, nodeName);
// Fill all cells the widget is spanning
for (var i = 0; i < span && x < cells[y].length; i++, x++)
{
cell = this._getCell(cells, x, y);
if (cell.widget == null)
{
cell.widget = widget;
}
else
{
throw("Grid cell collision, two elements " +
"defined for cell (" + x + "," + y + ")!");
}
}
}
// If the node is a row, create the widgets which belong into
// the row
var x = 0;
if (nodeName == "row")
{
et2_filteredNodeIterator(node, _readRowNode, this);
}
else
{
_readRowNode.call(this, node, nodeName);
}
y++;
}, this);
},
_expandLastCells: function(_cells) {
var h = _cells.length;
var w = (h > 0) ? _cells[0].length : 0;
// Determine the last cell in each row and expand its span value if
// the span has not been explicitly set.
for (var y = 0; y < h; y++)
{
for (var x = w - 1; x >= 0; x--)
{
var cell = _cells[y][x];
if (cell.widget != null)
{
if (cell.autoColSpan)
{
cell.colSpan = w - x;
}
break;
}
}
}
// Determine the last cell in each column and expand its span value if
// the span has not been explicitly set.
for (var x = 0; x < w; x++)
{
for (var y = h - 1; y >= 0; y--)
{
var cell = _cells[y][x];
if (cell.widget != null)
{
if (cell.autoRowSpan)
{
cell.rowSpan = h - y;
}
break;
}
}
}
},
/**
* As the does not fit very well into the default widget structure, we're
* overwriting the loadFromXML function and doing a two-pass reading -
* in the first step the
*/
loadFromXML: function(_node) {
// Get the columns and rows tag
var rowsElems = et2_directChildrenByTagName(_node, "rows");
var columnsElems = et2_directChildrenByTagName(_node, "columns");
if (rowsElems.length == 1 && columnsElems.length == 1)
{
var columns = columnsElems[0];
var rows = rowsElems[0];
var colData = [];
var rowData = [];
// Fetch the column and row data
this._fetchRowColData(columns, rows, colData, rowData);
// Initialize the cells
var cells = this._initCells(colData, rowData);
// Create the widgets inside the cells and read the span values
this._fillCells(cells, columns, rows);
// Expand the span values of the last cells
this._expandLastCells(cells);
// Create the table rows
this.createTableFromCells(cells);
}
else
{
throw("Error while parsing grid, none or multiple rows or columns tags!");
}
},
createTableFromCells: function(_cells) {
// Set the rowCount and columnCount variables
var h = this.rowCount = _cells.length;
var w = this.columnCount = (h > 0) ? _cells[0].length : 0;
this.managementArray = [];
this.cells = _cells;
// Create the table rows.
for (var y = 0; y < h; y++)
{
var row = _cells[y];
var tr = $j(document.createElement("tr")).appendTo(this.tbody);
// Create the cells. x is incremented by the colSpan value of the
// cell.
for (var x = 0; x < w;)
{
// Fetch a cell from the cells
var cell = this._getCell(_cells, x, y);
if (cell.td == null && cell.widget != null)
{
// Create the cell
var td = $j(document.createElement("td")).appendTo(tr);
// Add the entry for the widget to the management array
this.managementArray.push({
"cell": td[0],
"widget": cell.widget
});
// Trigger the "onSetParent" event of the widget
cell.widget.onSetParent();
// Set the span values of the cell
var cs = (x == w - 1) ? w - x : Math.min(w - x, cell.colSpan);
var rs = (y == h - 1) ? h - y : Math.min(h - y, cell.rowSpan);
// Set the col and row span values
if (cs > 1) {
td.attr("colspan", cs);
}
if (rs > 1) {
td.attr("rowspan", rs);
}
// Assign the td to the cell
for (var sx = x; sx < x + cs; sx++)
{
for (var sy = y; sy < y + rs; sy++)
{
this._getCell(_cells, sx, sy).td = td;
}
}
x += cell.colSpan;
}
else
{
x++;
}
}
}
},
/**
* The grid needs its own assign function in order to fill the grid
* accordingly.
*/
assign: function(_obj) {
if (_obj instanceof et2_grid)
{
// Remember all widgets which have already been instanciated
var instances = [];
// Copy the cells array of the other grid and clone the widgets
// inside of it
var cells = new Array(_obj.cells.length);
for (var y = 0; y < _obj.cells.length; y++)
{
cells[y] = new Array(_obj.cells[y].length);
for (var x = 0; x < _obj.cells[y].length; x++)
{
var srcCell = _obj.cells[y][x];
var widget = null;
if (srcCell.widget)
{
// Search for the widget inside the instances array
for (var i = 0; i < instances.length; i++)
{
if (instances[i].srcWidget == srcCell.widget)
{
widget = instances[i].widget;
break;
}
}
if (widget == null)
{
widget = srcCell.widget.clone(this, srcCell.widget.type);
instances.push({
"widget": widget,
"srcWidget": srcCell.widget
});
}
}
cells[y][x] = {
"widget": widget,
"td": null,
"colSpan": srcCell.colSpan,
"rowSpan": srcCell.rowSpan
}
}
}
// Create the table
this.createTableFromCells(cells);
// Copy a reference to the content array manager
if (_obj._mgr)
{
this._mgr = _obj._mgr;
}
}
else
{
throw("Invalid assign to grid!");
}
},
getDOMNode: function(_sender) {
// If the parent class functions are asking for the DOM-Node, return the
// outer table.
if (_sender == this)
{
return this.table[0];
}
// Check whether the _sender object exists inside the management array
for (var i = 0; i < this.managementArray.length; i++)
{
if (this.managementArray[i].widget == _sender)
{
return this.managementArray[i].cell;
}
}
return null;
},
set_id: function(_value) {
this._super.apply(this, arguments);
// Check whether a namespace exists for this element
this.checkCreateNamespace();
}
});
et2_register_widget(et2_grid, ["grid"]);